Yecch. Don't try to untangle it, just cut it off at the tubers in the soil. It will grow back quickly.

Yeah,it was an impossible mission.Most of the vines were cut but there are some tubers with theirs still attached.I planted most of tubers in the same pot and will plant some in the garden as a groundcover and see how it goes.

The little buttons on the vine will grow into the tubers if they touch soil.